Unity installation

I would like to install a Unity server on a network system which has AD and Exchange 2000 server installed already. In the network, only one DC server and one Exchange 2000 server are running. So, can I install a Unity server on the network without re-installing the exsiting exchange 2000 server? <br><br>

I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
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